Abstract
Tribological properties of an alumina-added apatite–wollastonite glass–ceramic produced by controlled heat treatment of a glass in the system MgO–CaO–SiO 2–P 2O 5–Al 2O 3 have been evaluated and compared with those of selected commercial dental ceramics, Duceragold and IPS Empress. Tribological tests were performed in dry condition and in simulated body fluid (SBF) using a pin-on-disk apparatus. The friction coefficient and specific wear rate of the tested materials were measured in dry and in artificial saliva (simulated body fluid: SBF) in order to elucidate the appropriateness of the alumina-added apatite–wollastonite (A–W) glass–ceramic for dental applications. Wear rate of the materials investigated varied from 0.96 × 10 −4 mm 3 N −1 m to 41.37 × 10 −4 mm 3 N −1 m depending on the bioenvironmental test conditions. The results of this study revealed that the alumina-added A–W glass–ceramic becomes more wear resistant as sintering temperature is increased and exhibits tribological properties similar to those of the commercial dental materials investigated.
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